package com.SpringbootVue.controller;

import com.SpringbootVue.pojo.Result;
import com.SpringbootVue.pojo.User;
import com.SpringbootVue.service.UserService;
import com.SpringbootVue.utils.JwtUtil;
import com.SpringbootVue.utils.Md5Util;
import com.SpringbootVue.utils.ThreadLocalUtil;
import jakarta.validation.constraints.Pattern;
import org.hibernate.validator.constraints.URL;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.data.redis.core.ValueOperations;
import org.springframework.util.StringUtils;
import org.springframework.validation.annotation.Validated;
import org.springframework.web.bind.annotation.*;

import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.TimeUnit;

@RestController
@RequestMapping("/user")
@Validated
public class UserController {

    @Autowired
    private UserService userService;
    @Autowired
    private StringRedisTemplate stringRedisTemplate;

    @PostMapping("/register")
    public Result register( @Pattern(regexp = "^\\S{5,16}$") String username, @Pattern(regexp = "^\\S{5,16}$") String password) {
        System.out.println(username);
        //查询用户
        User u = userService.findByUserName(username);
        System.out.println("注册查询的user"+u);
        if (u == null) {
            //没有占用
            //注册
            userService.register(username, password);
            return Result.success();
        } else {
            //占用
            return Result.error("用户名已被占用");
        }
    }

    @PostMapping("/login")
    public Result<String> login( @Pattern(regexp = "^\\S{5,16}$") String username, @Pattern(regexp = "^\\S{5,16}$") String password) {
        //根据用户名查询用户
        User loginUser = userService.findByUserName(username);
        //判断该用户是否存在
        if (loginUser == null) {
            return Result.error("用户名错误");
        }
        //判断密码是否正确  loginUser对象中的password是密文
        if (Md5Util.getMD5String(password).equals(loginUser.getPassword())) {
            //登录成功 将token令牌返回
            Map<String, Object> claims = new HashMap<>();
            claims.put("id", loginUser.getId());
            claims.put("username", loginUser.getUsername());
            String token = JwtUtil.genToken(claims);
            //把token存储到redis中
            ValueOperations<String, String> operations = stringRedisTemplate.opsForValue();
            operations.set(token, token, 1, TimeUnit.HOURS);
            //过期时间要和拦截器里面设计的token过期时间一致 见JwtUtil.getToken() 存储到Redis的k:v 都是token
            System.out.println("登录成功后的token：" + token);
            return Result.success(token);//将登录成功后后台生成的token返回给浏览器        }
        }
        return Result.error("密码错误");
    }

    @GetMapping("/userInfo")
    public Result<User> userInfo(/*@RequestHeader(name = "Authorization") String token*/) {
        //基于token，根据用户名查询用户信息 但是如果其他方法也类似，都是在Controller获取token，比较繁琐
        //因此，使用ThreadLocal，在拦截器中实现通过token
       /* Map<String, Object> map = JwtUtil.parseToken(token);
        String username = (String) map.get("username");*/

        Map<String, Object> map = ThreadLocalUtil.get();
        String username = (String) map.get("username");
        System.out.println("通过ThreadLocal在拦截器中获取token中的用户信息，userInfo:"+username);
        User user = userService.findByUserName(username);
        return Result.success(user);
    }

    @PutMapping("/update")
    public Result update(@RequestBody @Validated User user) {
        userService.update(user);
        return Result.success();
    }

    @PatchMapping("updateAvatar")
    public Result updateAvatar(@RequestParam @URL String avatarUrl) {
        userService.updateAvatar(avatarUrl);
        return Result.success();
    }

    @PatchMapping("/updatePwd")
    public Result updatePwd(@RequestBody Map<String, String> params,@RequestHeader("Authorization") String token) {
        //1.校验参数
        String oldPwd = params.get("old_pwd");
        String newPwd = params.get("new_pwd");
        String rePwd = params.get("re_pwd");
        if (!StringUtils.hasLength(oldPwd) || !StringUtils.hasLength(newPwd) || !StringUtils.hasLength(rePwd)) {
            return Result.error("缺少必要的参数");
        }
        //原密码是否正确
        //调用userService根据用户名拿到原密码,再和old_pwd比对
        Map<String,Object> map = ThreadLocalUtil.get();
        String username = (String) map.get("username");
        User loginUser = userService.findByUserName(username);
        if (!loginUser.getPassword().equals(Md5Util.getMD5String(oldPwd))){
            return Result.error("原密码填写不正确");
        }
        //newPwd和rePwd是否一样
        if (!rePwd.equals(newPwd)){
            return Result.error("两次填写的新密码不一样");
        }
        //2.调用service完成密码更新
        userService.updatePwd(newPwd);
        //删除redis中对应的token
        ValueOperations<String, String> operations = stringRedisTemplate.opsForValue();
        operations.getOperations().delete(token);
        return Result.success();
    }

    @PostMapping ("/logout")
    public Result logout(@RequestHeader("Authorization") String token) {
        //删除redis中对应的token
        System.out.println("退出登录：原始token"+token);
        ValueOperations<String, String> operations = stringRedisTemplate.opsForValue();
        operations.getOperations().delete(token);
        return Result.success();
    }

}
